Drilling device and drilling method using such a drilling device
AssigneeLe Creneau Industriel
InventorsSebastien Baud, Bruno Botton
Life of this patent
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Abstract
There is provided a drilling device for drilling a sheet having conical portions, including a tool-holder plate provided with a plurality of rotary drilling spindles with drill bits oriented according to drilling directions parallel to a mean drilling direction, said drilling spindles being distributed in columns configured to be arranged according to an axial direction and in rows configured to be arranged according to a transverse direction at right angles to the axial direction, the device including at least two rows of spindles and at least two columns of spindles, wherein a center-to-center distance between two spindles of a row is different from a center-to-center distance between two spindles of another row.
Claims12
A drilling device for drilling a sheet having conical portions, comprising:
- a tool-holder plate provided with a plurality of rotary drilling spindles with drill bits oriented according to drilling directions parallel to a mean drilling direction, said drilling spindles being distributed in columns configured to be arranged according to an axial direction and in rows configured to be arranged according to a transverse direction at right angles to the axial direction;
- and
- at least two rows of spindles and at least two columns of spindles,
- wherein a center-to-center distance between two spindles of a row is different from a center-to-center distance between two spindles of another row, and
- wherein G is a nominal center-to-center distance between two spindles of a same row in a matrix configuration of the tool-holder plate and ΔEi is a maximum inter-patch deviation determined for a row Li which would result from drillings over a conical portion by a matrix configuration of the tool-holder plate, i is an integer number such that i=1 to n, where n is a number of rows of spindles of the tool-holder plate. and a distance between two spindles of a same row i is given by the relationship:
- D
- =
- G
- +
- F
- i
- =
- G
- +
- k
- 1
- (
- m
- -
- 1
- )
- *
- Δ
-
-
- E
- i
- ,
- where m corresponds to a number of columns of spindles of the tool-holder plate and k1 is a constant.
A drilling device for drilling a sheet having conical portions, comprising a tool-holder plate provided with a plurality of rotary drilling spindles with drill bits oriented according to drilling directions parallel to a mean drilling direction, said drilling spindles being distributed in columns configured to be arranged according to an axial direction and in rows configured to be arranged according to a transverse direction at right angles to the axial direction, the device comprising at least two rows of spindles and at least two columns of spindles, wherein a center-to-center distance between two spindles of a row is different from a center-to-center distance between two spindles of another row, and wherein G is a nominal center-to-center distance between two spindles of a same row in a matrix configuration of the tool-holder plate and ΔEi is a maximum inter-patch deviation determined for a row Li which would result from drillings over a conical portion by a matrix configuration of the tool-holder plate, i is an integer number such that i=1 to n, where n is a number of rows of spindles of the tool-holder plate, and a distance between two spindles of a same row i is given by the relationship:
- D
- =
- G
- +
- F
- i
- =
- G
- +
- k
- 1
- (
- m
- -
- 1
- )
- *
- Δ
-
-
- E
- i
- ,
- where m corresponds to a number of columns of spindles of the tool-holder plate and k1 is a constant.
Dependencies are inferred from the claim text.